Yes, I was surprised for the same reason. I wouldn't have thought there would be enough unchanged data for that to work. But it does. The next ISO of pcPuppyOS (will post tonight) will also offer an Xdelta patch from RC3 to RC4, at only 16 mb (compared to the 602 MB iso)._________________Between depriving a man of one hour from his life and depriving him of his life there exists only a difference of degree. --Muad'Dib

Re mediafire, I've been using them too (puppy xdeltas, pawedcasts, manuals), so I'd recommend them too, but maybe in the linked-to Hosts for Large Files thread, where limits, experience etc can be discussed.

Re xdeltas, now that I've played around with them a bit, I can't believe everybody everywhere isn't using them. I think these will be the real bandwidth saviour.

I've been pimping them in the Spanish & French Puppy forums too, so some non-English puplets & localizations might start appearing in xdelta format.

Re CoBlitz, maybe we need some kind of control experiment, to see how a CoBlitzed and unCoBlitzed download compare, to see if it really makes a difference to the host. Because if it does, then that is just so damned easy. Just http://coblitz.codeen.org/ at the start of any link you publish.

That created the oldisotonewiso.delta file which weighed in at 23 megabytes.

I deleted the speak2pup.iso file and recreated it using

xdelta -d fat-ree-2.17-.iso oldisoto newiso.delta speak2pup.iso

to recreate the speak2pup.iso. It did. This version of speak2pup.iso weighs in at 48 megabytes. It may be some forty years since I took high school algebra but I don't believe that you can take one size file, combine it with another and come with a file that is smaller than the first.

Best way to check it worked: make an md5sum of the original, and compare it against the one you create. It should match exactly.

md5sum oldfile
md5sum newfile

Or, if you want to create (or use) a text file with the md5sum inside:
create:
md5sum oldfile > oldfile.md5.txt
check:
md5sum -c oldfile.md5.txt
That method assumes the file you're checking has the same name though._________________Between depriving a man of one hour from his life and depriving him of his life there exists only a difference of degree. --Muad'Dib

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